This adjustable helmet accessory with a chin strap and button is designed to provide maximum safety and comfort. The BOA rotary lock system allows for effortless size adjustments, ensuring a secure and comfortable fit for any head size. Ideal for use in construction, sports, and other high-intensity activities, this accessory keeps your helmet firmly in place. Its versatility and ease of use make it an indispensable part of your safety equipment. Features - Color: Black -Material:Plastic - Size: 36.00X11.00X1.00cm/14.15X4.32X0.39in -Adjustable helmet regulator: the helmet regulator allows for easy adjustment of the helmet size, providing a secure fit for every user - chin strap adjustment: the chin strap features a button for rapid and precise size adjustments, ensuring the helmet remains securely fastened -Reliable boa rotator head lock: the boa rotator head lock provides a secure locking mechanism, preventing the helmet from becoming loose during use -Lightweight and comfortable design: made from lightweight materials, this accessory ensures that the helmet remains comfortable to wear for extended periods -Versatile and compatible: suitable for various types of safety helmet, this accessory enhances both safety and comfort, making it ideal for different applications Package list: 1 x hard hat chin strap 5 x buckles 1 melt adhesive